We're lucky enough to spend 2 months this summer outside of Paris staying with family and enjoying the culture. My 3 kids play OK tennis not great by any means. 14y.o. girl ranked around 50 in 14's Southwest region; 10y.o. girl rankend around 20 in 10's Southwest; and 7 y.o. boy who can rally a bit.

Does anyone know where I can get them in for tennis around Paris as far as camps and junior program?

I know they have the Mouratoglou Academy but that's too high level for them I'm sure.

My apologies in advance, but I'm not fluent in French so if you don't mind replying in English?

Your best bet is to look at the FFT (French tennis federation) website www.fft.fr - France has a national club system and many if not most all sports and tennis clubs have junior tennis. If you go to the Site FFT tab and then find the Competitions Tab hit the FOREIGN PLAYERS tab and it has in English what you will need to know.
Just about every district and even small villages have Tennis clubs - if you are in Paris proper you will find lots of Jr programs.